Same thing that can burn elsewhere like equipment, insulation, paint on the bulkhead, plastic, circuit boards, swabs, lots of things. Fire is possible on any ship. There is no fire proof ship and fire onboard ship is a serious danger. That is why prevention is taken so serious.
I knew a Damage Control Assistant {DCA} a Lt Commander in rank who cut no one any slack on things like electrical inspection safety tags. No not even the Admiral was immune from his wrath. His solution for not having an inspection sticker was simple. He cut the cord.
I thought they did fire drills til they were blue in the face.
The Navy has already decided to repair USS Miami for a cost of $400 million.
The LA class boats can get 10 to 20 years of life after Engineered Refueling Overhaul (ERO).
USS Miami could be in service until the early 2030’s.